FCFS disk scheduling [closed]
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I want to find head movement through Disk Scheduling first come first serve algorithm
queue = 98, 183, 37, 122, 14, 124, 65, 67
head start at 53
I have confused because this same quotation two book different answer first give head movement of 236 cylinders and other book answer 640 cylinders. I don't know which one correct answer.
disk scheduling
asked Sep 25 at 13:49
Shiva Manhar
1085
closed as unclear what you're asking by countermode, Jeff Schaller, Romeo Ninov, RalfFriedl, Goro Sep 26 at 0:01
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
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up vote
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I want to find head movement through Disk Scheduling first come first serve algorithm
queue = 98, 183, 37, 122, 14, 124, 65, 67
head start at 53
I have confused because this same quotation two book different answer first give head movement of 236 cylinders and other book answer 640 cylinders. I don't know which one correct answer.
disk scheduling
asked Sep 25 at 13:49
Shiva Manhar
1085
closed as unclear what you're asking by countermode, Jeff Schaller, Romeo Ninov, RalfFriedl, Goro Sep 26 at 0:01
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
2
Welcome to U&L. I think without giving much more context, the question is not answerable.
– countermode
Sep 25 at 13:56
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up vote
1
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up vote
1
down vote
favorite
I want to find head movement through Disk Scheduling first come first serve algorithm
queue = 98, 183, 37, 122, 14, 124, 65, 67
head start at 53
I have confused because this same quotation two book different answer first give head movement of 236 cylinders and other book answer 640 cylinders. I don't know which one correct answer.
disk scheduling
asked Sep 25 at 13:49
Shiva Manhar
1085
I want to find head movement through Disk Scheduling first come first serve algorithm
queue = 98, 183, 37, 122, 14, 124, 65, 67
head start at 53
I have confused because this same quotation two book different answer first give head movement of 236 cylinders and other book answer 640 cylinders. I don't know which one correct answer.
disk scheduling
disk scheduling
asked Sep 25 at 13:49
Shiva Manhar
1085
asked Sep 25 at 13:49
Shiva Manhar
1085
edited Sep 25 at 13:59
asked Sep 25 at 13:49
Shiva Manhar
1085
asked Sep 25 at 13:49
Shiva Manhar
1085
asked Sep 25 at 13:49
Shiva Manhar
1085
1085
closed as unclear what you're asking by countermode, Jeff Schaller, Romeo Ninov, RalfFriedl, Goro Sep 26 at 0:01
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as unclear what you're asking by countermode, Jeff Schaller, Romeo Ninov, RalfFriedl, Goro Sep 26 at 0:01
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
2
Welcome to U&L. I think without giving much more context, the question is not answerable.
– countermode
Sep 25 at 13:56
add a comment |Â
2
Welcome to U&L. I think without giving much more context, the question is not answerable.
– countermode
Sep 25 at 13:56
2
2
Welcome to U&L. I think without giving much more context, the question is not answerable.
– countermode
Sep 25 at 13:56
Welcome to U&L. I think without giving much more context, the question is not answerable.
– countermode
Sep 25 at 13:56
add a comment |Â
1 Answer
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From   53 to   98  =   98−53 =   45
From   98 to 183  = 183−98 =   85
From 183 to   37  = 183−37 = 146
From   37 to 122  = 122−37 =   85
From 122 to   14  = 122−14 = 108
From   14 to 124  = 124−14 = 110
From 124 to   65  = 124−65 =   59
From   65 to   67  =   67−65 =     2
45 + 85 + 146 + 85 + 108 + 110 + 59 + 2 = 640
You would get different results if you stipulated that
the 98, 183, 37, 122, 14, 124, 65, and 67 were track numbers,
with multiple tracks per cylinder,
but (after a few minutes of trying various assumptions),
I couldn’t get it to come out to 236.
answered Sep 25 at 21:31
G-Man
11.9k92658
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
From   53 to   98  =   98−53 =   45
From   98 to 183  = 183−98 =   85
From 183 to   37  = 183−37 = 146
From   37 to 122  = 122−37 =   85
From 122 to   14  = 122−14 = 108
From   14 to 124  = 124−14 = 110
From 124 to   65  = 124−65 =   59
From   65 to   67  =   67−65 =     2
45 + 85 + 146 + 85 + 108 + 110 + 59 + 2 = 640
You would get different results if you stipulated that
the 98, 183, 37, 122, 14, 124, 65, and 67 were track numbers,
with multiple tracks per cylinder,
but (after a few minutes of trying various assumptions),
I couldn’t get it to come out to 236.
answered Sep 25 at 21:31
G-Man
11.9k92658
add a comment |Â
up vote
1
down vote
accepted
From   53 to   98  =   98−53 =   45
From   98 to 183  = 183−98 =   85
From 183 to   37  = 183−37 = 146
From   37 to 122  = 122−37 =   85
From 122 to   14  = 122−14 = 108
From   14 to 124  = 124−14 = 110
From 124 to   65  = 124−65 =   59
From   65 to   67  =   67−65 =     2
45 + 85 + 146 + 85 + 108 + 110 + 59 + 2 = 640
You would get different results if you stipulated that
the 98, 183, 37, 122, 14, 124, 65, and 67 were track numbers,
with multiple tracks per cylinder,
but (after a few minutes of trying various assumptions),
I couldn’t get it to come out to 236.
answered Sep 25 at 21:31
G-Man
11.9k92658
add a comment |Â
up vote
1
down vote
accepted
up vote
1
down vote
accepted
From   53 to   98  =   98−53 =   45
From   98 to 183  = 183−98 =   85
From 183 to   37  = 183−37 = 146
From   37 to 122  = 122−37 =   85
From 122 to   14  = 122−14 = 108
From   14 to 124  = 124−14 = 110
From 124 to   65  = 124−65 =   59
From   65 to   67  =   67−65 =     2
45 + 85 + 146 + 85 + 108 + 110 + 59 + 2 = 640
You would get different results if you stipulated that
the 98, 183, 37, 122, 14, 124, 65, and 67 were track numbers,
with multiple tracks per cylinder,
but (after a few minutes of trying various assumptions),
I couldn’t get it to come out to 236.
answered Sep 25 at 21:31
G-Man
11.9k92658
From   53 to   98  =   98−53 =   45
From   98 to 183  = 183−98 =   85
From 183 to   37  = 183−37 = 146
From   37 to 122  = 122−37 =   85
From 122 to   14  = 122−14 = 108
From   14 to 124  = 124−14 = 110
From 124 to   65  = 124−65 =   59
From   65 to   67  =   67−65 =     2
45 + 85 + 146 + 85 + 108 + 110 + 59 + 2 = 640
You would get different results if you stipulated that
the 98, 183, 37, 122, 14, 124, 65, and 67 were track numbers,
with multiple tracks per cylinder,
but (after a few minutes of trying various assumptions),
I couldn’t get it to come out to 236.
answered Sep 25 at 21:31
G-Man
11.9k92658
edited Sep 25 at 21:43
answered Sep 25 at 21:31
G-Man
11.9k92658
answered Sep 25 at 21:31
G-Man
11.9k92658
answered Sep 25 at 21:31
G-Man
11.9k92658
11.9k92658
add a comment |Â
add a comment |Â
2
Welcome to U&L. I think without giving much more context, the question is not answerable.
– countermode
Sep 25 at 13:56